/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.gearpump.cluster.cgroup;

import java.util.Set;

public class Hierarchy {

  private final String name;

  private final Set<ResourceType> resourceTypes;

  private final String type;

  private final String dir;

  private final CgroupCommon rootCgroups;

  public Hierarchy(String name, Set<ResourceType> resourceTypes, String dir) {
    this.name = name;
    this.resourceTypes = resourceTypes;
    this.dir = dir;
    this.rootCgroups = new CgroupCommon(this, dir);
    this.type = CgroupUtils.reAnalyse(resourceTypes);
  }

  public Set<ResourceType> getResourceTypes() {
    return resourceTypes;
  }

  public String getType() {
    return type;
  }

  @Override
  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + ((dir == null) ? 0 : dir.hashCode());
    result = prime * result + ((name == null) ? 0 : name.hashCode());
    result = prime * result + ((type == null) ? 0 : type.hashCode());
    return result;
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj)
      return true;
    if (obj == null)
      return false;
    if (getClass() != obj.getClass())
      return false;
    Hierarchy other = (Hierarchy) obj;
    if (dir == null) {
      if (other.dir != null)
        return false;
    } else if (!dir.equals(other.dir))
      return false;
    if (name == null) {
      if (other.name != null)
        return false;
    } else if (!name.equals(other.name))
      return false;
    if (type == null) {
      if (other.type != null)
        return false;
    } else if (!type.equals(other.type))
      return false;
    return true;
  }

  public String getDir() {
    return dir;
  }

  public CgroupCommon getRootCgroups() {
    return rootCgroups;
  }

  public String getName() {
    return name;
  }

  public boolean subSystemMounted(ResourceType subsystem) {
    for (ResourceType type : this.resourceTypes) {
      if (type == subsystem)
        return true;
    }
    return false;
  }
}
